-Check their followers: are many of them without pictures? No posts? Weird names? No names? No Bio?
-Check what they commented exactly: do the comment looks like an output of a robot? Spam comments..?
-How are their posts – do they look authentic or trash/junk/spam/low quality?
Good luck brand & #Influencer heroes! – #DearMishuDad (Influencer contract template here or via sign-up)